Does anyone upload to Second Life from Blender?
I have now successfully answered all of the questions to all of the issues I was having previously!

Too high vertex count - reduced

Small triangles that added material upon import into Second Life - removed

Mirrored object showing two left feet - still unsure how this one fixed itself

Avatar being offset (flung) along the Z axis - upon import into SL, don't include joint positions

Frankenstein mishap, click only feet, export, manually choose the default settings for rigged open sim instead of choosing the automatic one, not sure why.

I may have graduated from Grasshopper level Blender user!